Bummer. I did some searching and found this guy - http://shopcapaldiracing.com/fp350s-brake-duct-kit/
Wonder if it would fit a normal 350(R). Those brake duct intakes are badass on the FP350S!
I don't believe this kit includes the hub mounted ducts -- it shows only the facia ducts. The GT4 cars use the stock 350(R) facia ducts, cut short and then attach 4" cooling ducts, rather than these that are used on the FP350S